US434328A

US434328A - Reversing-valve

Info

Publication number: US434328A
Authority: US
Publication date: 1890-08-12
Anticipated expiration: 1907-08-12

Description

(No Model.) 2 Sheets-Sheef 1,v A. L. ENGBLBAOH.

REVBRSING VALVE.

No. 434,328. Patented Aug'. 12. 1890.

w/TNESSES A TTORNEYS 2 sheets-sheen 2.

(No Model.)

A. L. BNGBLBAGH.' RBVBRSING VALVE.

No'. 434,328. Patented Aug. 12.17890.

/NVENTOH w/r/vEssEs.-

UNITED STATES PATENT OFFICE.

AUGUSTUS L. ENGELBAOH, OF LEADVILLE, COLORADO.

SPECIFICATION forming part of Letters Patent No. 434,328, dated August 12, 1890.

Application led January 28, 1890. Serial No. 838,329- (No model.)

To all whom it may concern: .y

Beit known that I, AUGUSTUS L. ENGEL- BACH, of Leadville, in the county of Lake and State of Colorado, have invented a new and Improved Valve for Steam-Engines, of which the following is a full, clear, and exact description.

The obj ect of the invention is to provide a new and improved steam-engine valve which is simple and durable in construction, very effective in operation, and permits of quickly reversing the engine at any time.

The invention consists of aslide-valve and a semi-cylindrical valve-seat,on which the said slide-valve operates and which is mounted to be turnedin the steam-chest.

The invention also consists of certain parts and details and combinations of the same, as will be hereinafter fully described, and then pointed out in the claims.

Reference isto bev had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure lis a sectional side elevation of the improvement as applied. Fi g. 2 is a transverse section of the same, on the line c :c of Fig. l. Fig. 3 is a plan view of the steam-chest and cylinder. Fig. 4 is a plan view of the valve-- seat. Fig. 5 is an inverted plan view of the same. Fig. 6 is a transverse section of the same on the line y yof Fig. 4. Fig. 7 is 'a like View of the same on the line c ,e of Fig. 4, and Fig. 8 is a similar view of the same on the line w "w of Fig. 4.

In the steam-engine cylinder A, is held to slide, in the usual manner, the piston B, se curedon thepiston-rod C. On the top ofthe cylinder Ais arranged asteam-chest D, provided with a semi-cylindrical bottom E, in which is held to turn the similarly-shaped valve-seat F, on the iiat top of which is mounted to slide longitudinally a slide-valve G, heldin place at the sides by the ribs and flanges F', projecting from the sides of the valve-seat F. The slide-valve G is provided at its under side with theusual cavity G, and receives a sliding motion by being connected with the valve-stem H by means of collars l, fitting against the raised ends of the slide-valve G, so as to permit the latter to change its position sidewise without interfering in the least usual manner, from the main driving-shaft of 5 5 the engine.

In one end of the valve-Seat F is secured a shaft J, which extends in an opposite direction to the valve-stem H, and is placed in axial line with the latter. The short shaft J passes through suitable stufling-boxes in the end of' the steam-chest D, and carries on its outer end a lever K, on which is pivoted a small hand-lever L, connected with a pin N, held to slide in the lever K- and adapted to engage one of the apertures O and O2, formed in the segmental plate O, secured by a suitable bracket or other means to the top of the Steam-chest D. As shown in Fig. 2, the pin N engages the aperture O, and when live steam isadmitted to the steam-chest D the engine runs in one direction; but Whenthe operator desires to reverse the engine he presses on the lever L, so as to disengage the pin N from the aperture O, and moves the lever K in the direction of the arrow Xuntil ythe pin N registers with the aperture O2 and engages the latter, so that the lever K is locked in place.

The arrangement of the several ports is as follows: From the outer end of the cylinder A, at one side, leads a port a, which extends under the semicircular bottom E of the steamchest D, and connects with the interior of the latter by ports a and a2, extending in line with each other, as is plainly shown in Fig. 3. From the inner end of the cylinder A leads a port b, which extends longitudinally under the semicircular bottom E of the said chest D, and connects with the latter lby tho ports b and b2, located opposite the ports a2 y and a', respectively, and extending in line with each other. adapted to register alternately, according to the direction in which it is desired to run the engine, with the ports c and c2, formed in the under side of the valve-seat F and leading to the port c', leading to the top of the valve-seat, and over which operates the slidevalve G. Over the ports a2 and b operate the ports d2 and d', respectively, also formed in the valve-seat Fand leading to a common port d, extending to the top of the seat F, and over which operates the slide-valve G.

The ports a and b2 are IOC Between the ports c and d in the seat F is arranged the exhaust-port c, which extends from the top of the valve to one side, to connect with a port f, leading to the exhaustpipe Q, over which is arranged the steaminlet pipe P, leading to the top of the steamchest D. The slide-valve G in its forward and backward motion alternately connects the port c with the port c and the port d with the port e in order to exhaust.

iThe operation is as follows: lVhen the lever K engages with its pin N the aperture O in the segmental plate O, then the valve-seat F stands in the position shown in Fig. 2, in which the port c2 registers with the port b2, while the port c is closed. At the same time the port d2 registers with the port c2, while the port d is closed. Now, when the steam is admitted through the inlet-pipe P into the interior of the steam-chest D, then the steam first passes through the port c (see Fig. l) and the port b2 into the port b and to the inner end of the cylinder, thus exerting pressure against the piston B and forcing the same in the inverse direction ot' the arrow X. The exhaust in front of the piston B takes place through the port a, the port a2, the port d2, and the port d, and from the latter past the cavity G in the slide-valve G tothe exhaustport e, which latter at all times connects with the exhaustport f, leading to the exhaustpipe Q. Before the piston B has reached the end of its stroke the position of the slidevalve G changes, so that the port d becomes uncovered and steam from the steam-chest now passes through the ports d and cl2, through port aginto the longitudinal port a, which leads to the outer end of the cylinder, so that the piston ,B is forced on its return-stroke in the direction of the arrow X. The exhaust at the other side of the piston now takes place through the ports Z1 b2 d2 d, the cavity G in the slide valve G to the exhaust-port e, and through the port f tothe exhaust-pipe Q. Now, when the operator desires to reverse the engine at any timehe simply changes the position of the lever K, as above described, so that the valve-seat F turns in the bottom E of the steam -chest D, carrying with it the slide-valve G, which now remains connected with its valve-stem I'Las the axis of the movenient ot' the valve-seat F is in line with the axis of the valve-stem II. Thus the slidevalve G does not necessarily interrupt its travel while the reversing takes place. The changing of the valve-seat F connects the port d with the port b and the port c with the port a', while the ports cl2 and c2 remain closed. Steam from the steam-chest D now passes, when the several parts are in the position shown in Fig. l, through the port c, the port c to the port a', which leads the steam to the outer end of the cylinder, so as to force the piston B in the direction of arrow X. lVhen the position of the valve G changes, then the steam passes through the ports d, CZ', and b into the longitudinal port b and to the inner end of the cylinder A. The exhaust takes place in a similar manner through the same ports, only in reverse order. Thus it will be seen that by merely changing the position of the valve-seat F the en gine is reversed without interrupting even the movement of the slide-valve G.

-I-Iaving thus described my invent-ion, what I claim as new, and desire to secure by Letters Patent, is-

l. In a valve for steam-engines, the combination, with a slide-valve, of a valve-seat mounted to turn in the steam-chest to adapt its upper face upon which the said valve slides to be set at an angle, substantially as described.

2. In a valve for steamengines, a semicircular valve-seat provided with double sets of inlet-ports and mounted to turn in the steamchest, substantially as shown and described.

3. In a valve for steam-engines, the combination, with a semicireular valve-seat provided with double inlet-ports, a single exhaust-port, and mounted to turn in the steamchest, of an ordinary slide adapted to travel on the fiat top of the said Valve over the said ports, substantially as shown and described.

4. In avalve for steam-engines, the combination, with the ordinary slide-valve anda valve-stem loosely connected with the said slide-valve, of a semicircular valve-seat on which the said slide-valve is mounted to slide, the axis of the said valve-seat being in line with the said valve-stern, substantially as shown and described.

5. In a valve for steam-engines, the combination, with the ordinary slide-valveand a valve-stein loosely connected with the said slide-valve, of a semicircular valve-seat on which the said slide-valve is mounted to slide, the axis of the said valve-seat being in line with the said valve-stein, and ribs or flanges extending longitudinally on the sides of the said valve-seat to hold the said slidevalve in place, substantially as shown and described.

6. In a valve for steam-engines, the combi nation, with the ordinary slide-valve and a valve-stem loosely connected with the said slide-valve, of a semicircular valve-seat on which the said slide-valve is mounted to slide,

the axis of the said valve-seat being in line with the said valve-stem, the valve-seat being provided with an exhaust-port and two sets of inlet-ports, substantially as shown and described.

7. In a valve for steam-engines, the combination, with the ordinary slide-valve and a valve-stem loosely connected with the said slide-valve, of a semicircular valve-seat on which the said slide-valve is mounted to slide, the axis of the said valve-seatbeing in line with the said valve-stem, the said valve-seat being provided with an exhaust-port and two sets of inlet-ports, and means, substantially as described, for shifting the position of the said valve-seat, as set forth.

IOO

IZO

8. The combination, with a cylinder provided with two inlet-ports leading from oppo` site ends of the cylinder and each having two branch ports arranged in line with each other, and a steam-chest having asegmental bottom into which open the two branch ports, of a semicircular valve-seat fitted into the semicircular bottom of the said steam-chest and provided with inlet-ports, each having two branch ports adapted to alternately register with the branch ports of the cylinder-ports, substantially as shown and described.

9. The combination, with a cylinder provided with two inlet-ports leading from opposite ends of the cylinder and each having two branch ports arranged in linewith each other, and a steam-chest having a segmental bottom into which open the two branch ports, of a semicircular valve-seat fitted into the semicircular bottom of .the said steam-chest and provided with inlet-ports, each havingtwo branch ports adapted to alternately register with' the branch ports of the cylinder-ports, and a slide-valve held to slide on the top of the said valve-seat and provided with the usual cavity for connecting the said inlet-ports alternately with the exhaust-port in the said valveseat, substantially as shown and described.

10. The combination, with a cylinder provided with two inlet-ports leading from opposite ends of the cylinderand each having two branch ports arranged in line with each other, and a steam-chest havingasegmental bottom into whichopen the two branch ports,of asemicircular valve-seat fitted into the seinicircular bottom of the said steam-chest and provided with inlet-ports, each having two branch ports adapted to alternately register with the the position of the said valve-seat, substantially as shown and described.

11. The combination, with a cylinder provided with two inlet-ports leading from opposite ends of the cylinder and each having two branch ports arranged in line with each other, and a steam-chest having a segmental bottom into which open the twobranch ports, of a semicircular valve-seat fitted into the semicircular bottom ot the said steam-chest and provided with inlet-ports, each having two branch ports adapted to alternately register with the branch ports of the cylinder-ports, a slidevalve held to slide on the top of the said valve` seat and provided with the usual cavity for connecting the said inlet-ports alternately with the exhaust-port in the said valve-seat, a shaft extending from one end of the said valve-seat and having its axis in line with the stem of the slide-valve, a lever held on the outer end of the said shaft for changing the Y position of the said valve-seat, and means, substantially as described, forlocking the said lever in place when shifted, substantially as shown and described.

AUGUSTUS L. ENGELBAOH. Witnesses:

ALBERT S. BLAKE, DANIEL SAYER.